BlastinSideways12A

I started working on the ports today and will finish them up tonight. The engine is going into and 85 GSL. Enjoy and feel free to comment.

http://community.webshots.com/album/527175054lXOfxX

RotaryEvolution

iTrader: (30)

i would open up those secondary ports a bit more but that is just me, that is a baby streetport. leave the bridge but i tend to port out the 5th and 6th ports a bit more.

BlastinSideways12A

How would you open the secondaries more? You mean an earlier opening?

I will be porting the aux ports a bit more toward the inside of the housing once I get the Pineapple sleeve inserts and figure out what I need to do to smoothen the passage for the airflow. I don't want to add much more closing though, there is already plenty of that (or do you recommend it?).

I appreciate your input.

RotaryEvolution

iTrader: (30)

http://memimage.cardomain.net/member...66_14_full.jpg



just kidding, they look fine for a mild streetport.

if you want to go larger with the sleeve ports follow the direction they head in, up and in.

if you have extra time on your hands smooth out the inside of the runners with a round sanding wheel, not the port sleeve runners though.

BlastinSideways12A

Holy port volume!

I'm waiting on the smoothing stuff from eastwood. I think I will go with 80 grit to help out with atomisation if the fuel.

I'll post pictures of the primaries once I get them done. They are pretty nice. I based them off of a streetport for a 12A, they just don't extend down as far.

RotaryEvolution

iTrader: (30)

lol, thats a damaged iron, looks like someone got a little mad and hit it with a hammer.

edit: one thing, if you use the pineapple sleeves don't port the radius of the sleeve walls much or the sleeves can be sucked into the motor so be careful and just blend the porting.

BlastinSideways12A

I probably won't touch the sleeves, just the iron.

I am still deciding what to do with the exhaust ports. I have some sleeves from a pair of junked TII housings that I will definately use but I'm not sure how much earlier to open and later to close the ports. My exhaust is the Racing Beat long primary exhaust for a first gen.

BlastinSideways12A

Pictures of the primaries are up.

Mombodogs

Blastin, Im about 8 months old to rotaries, but from what I've researched and seen on porting, you are doing great. Karack, stop being such a prissy bitch, and give advice without the attitude. I am changing my mind about having respect for your knowledge, not that you care, but Blastin, keep the photos rolling. Great information for us rotary dogs!

PEACE THE DOG

RotaryEvolution

iTrader: (30)

it was a joke man, relax.

anyways... here is some of my porting just for reference though this is a 3rd gen motor the general idea is the same, to get the air velocity up by smoothing out the edges and having the runners blend smoothly:





pick up a dremel with a flexible extension line and a set of one small and one large round sanding wheels with 60 or 80 grit sanding wheels and also pick up a sanding flapper 80 grit, the small sanding wheels are used for more intricate porting in the bowls near the face of the iron and the large sanding wheels are used for the port runners. i use an air die grinder to remove all the casting impurities and take material off quickly but i know not everyone has a good carbide bit, an air die grinder or a decent air compressor so a dremel can do the complete job but take a little longer.

once you have everything smoothed use the flapper wheel to smooth it out completely to near mirror finish and if you want you can polish the surface to a mirror shine but imo that is a little overkill.

last but not least, it might be a good idea to place some thick vinyl sticker over the port while doing it to protect the face in case of a mishap but a steady hand can rule that out, i do all of my work freehand and never had one slip so far but now that i've said that....


you can leave the ports as is and just open up the duration, my tips are just in case you want to go the extra mile for added gains.

i may be prissy but i can still offer helpful suggestions.

SuperRotorMan

so how much horse does porting give u? is it enough of a difference to do it asap or should i just wait till next rebuild?

RotaryEvolution

iTrader: (30)

porting can generally add anywhere from 5% to 20%+ depending on the ports, some of my large streetports i would say add close to 20% but bridgeports and peripheral can add a bit more.

remember this though, with porting you are losing something to gain something meaning to gain more peak horsepower you will lose that low RPM torque for pulling off the line.

edit: as for the picture, i thought it was amusing and just found it earlier so i posted it up, nothing was implied by it.

nexpo8

y u suck a ****** dick??? blastin said to say wut u think. and karack said his opinion. btw nice ports tho keep up the good work.

rotarygod

iTrader: (1)

Those ports are fine size wise. There is absolutely no reason whatsoever to go any larger as you won't gain anything. Big ports don't necessarily mean big power, especially on a 6 port engine. I can't see them in person but from the pictures they look good. Get those housings cleaned up and maybe resurfaced and you'll be set.

BlastinSideways12A

I found humor in Karack's posts. No hard feelings.

The ports are finished as far as the die grinder is concerned except a little bit more on the auxiliary ports in the interest of smoother flow. My main goal with this engine is a nice torque curve with excellent drivability because the car that it will go in is a daily driver. I'm very pleased with how the ports came out, especially since this is my first try at porting other than a front TII iron which was junk. I did do a nice job on the port for it though.

The housings are boxed up and will be shipped out today to be resurfaced.

My next move is to finish bead blasting the center section of the intake manifold so I can set the manifolds aside to get them out of the way.

Then I will take out the NA exhaust sleeves and port the exhaust ports. I have a pair of Turbo sleeves with the EGR holes welded up that I will use in place of them. I'm still trying to decide what to do as far as port timing for these. I know that the template from racing beat opens the port a bit earlier but doesn't do anything with closing. I was thinking about opening it ealier but also just porting the closing edge up to the bevel and adding a new bevel. Of course I will blend the port in with the sleeve in the interest of smooth airflow and keeping velocity up.

Thanks for the advice and compliments. Keep em comin.

RotaryEvolution

iTrader: (30)

thats exactly what i do with the RB template, run it down to the RB opening and port that far down then i port the top bevel completely off and add a new one, ultimately port matching the exhaust port to the exhaust sleeve.

BlastinSideways12A

Started cleaning the rotors up tonight. I'm actually using ATF on them and it is working very well. I just brushed it all over and let them sit for a little, then brushed them with a nylon-bristle brush to remove the loose deposits. They are the dirtiest rotors i've had experience with. The engine had blown coolant seals so they are a bit rusty and carbon is pretty abundant but the ATF is working. Hopefully letting it sit overnight will loosen up the seals. Only one apex seal was able to be removed, the rest are stuck. Once I get the rotors cleaned I will polish them nicely to keep carbon off. I'll post some pictures later this week.

Last night I finished cleaning the intake system including the 6 port acutators and VDI stuff. All I have is the throttle body. I will be removing the cold start and the extra secondary throttle plates. I will most likely port it as well. My Megasquirt also just came in today.

fcdrifter13

Way better than the ones I did. I think that one Karak posted is the one I though out. LOL jk.

BlastinSideways12A

One exhaust port is done. The ports were a tad big for my liking but the housings were free and they are in nice shape so I will make them work. The ports were very uneven and poorly shaped. I just reshaped and evened them out. I think they will make nice high RPM power but may eat a little more gas than I would like. O well.